#pragma once
#include <iostream>
#include <set>
using namespace std;
class TwentyFourPoint
{
public:
	int a[30],n;
	set<set<int> > S;
	TwentyFourPoint(void);
	~TwentyFourPoint(void);
	void dfs(int sum,int pos,set<int> s);
	void achive();

};

